INCOME TAXES (Income Tax Expense Included in Income Statements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current Income Tax Expense
Federal	$ (1,000)	$ (2,000)	$ (2,000)
State	0	0	1,000
Total Current Income Tax Expense	(1,000)	(2,000)	(1,000)
Deferred Income Tax Expense
Federal	26,000	27,000	37,000
Federal Investment Tax Credits	(1,000)	(1,000)	(1,000)
State	8,000	8,000	6,000
Total Deferred Income Tax Expense	33,000	34,000	42,000
Total Income Tax Expense	$ 32,262	$ 32,476	$ 41,452